JP5165326B2 - Target presentation device - Google Patents

Description

  The present invention relates to an optotype presenting apparatus for presenting an inspection target for inspecting the refractive power of the eye to be examined and the binocular visual function test.

As an optotype presenting device, a test optotype drawn on a disk is illuminated from behind by a light source such as a halogen lamp, and a test optotype is projected onto a screen placed at a distant inspection distance such as 5 m, A type of target presentation device having a display such as a color liquid crystal is known (see, for example, Patent Documents 1 and 2).
In addition to the visual acuity index (see Fig. 1) used for the refractive power test and the red / green visual target for inspecting overcorrection, the test target presented by the optotype presenting apparatus includes an oblique test, Inspection targets for inspecting the binocular vision function are prepared by causing the left and right eyes to see different targets, such as fusion inspection and stereoscopic inspection. The binocular visual function test target has a red filter placed in front of one eye of the subject and a green filter placed in front of the other eye so that different targets are presented to the left and right eyes. There are red / green binocular visual function test targets.

FIG. 3 is an example of a Worth 4 point target used to examine fusion and eye suppression. In FIG. 3A, a Worth 4-point target 100 includes a red circular target portion 102 disposed on the upper side and a green circular target portion disposed on the left and right sides in a black background 101. 103 and 104, and the white circular target part 103 arrange | positioned below. When the inspection view 100 is viewed through a red filter arranged in front of the right eye, as shown in FIG. 3B, the red circle target 102 and the white circle target 105 are visually recognized in red. The On the other hand, since green light is cut by the red filter from the green circle target parts 103 and 104, the green circle target parts 103 and 104 are visually recognized in black and are buried in the black background 101. Further, when viewed through the green filter in front of the left eye, as shown in FIG. 3C, the red circle target 102 is black because the red light emitted therefrom is cut by the green filter. It is visually recognized and is buried in the black background 101. On the other hand, the green circular target parts 103 and 104 and the circular target part 105 are visually recognized in green. When the Worth 4-point target 100 is viewed with both eyes, when it is visually recognized in the state of FIG. 3B, it is determined that the left eye is suppressed, and is visually recognized in the state of FIG. It is determined that the right eye is suppressed. When the fusion is normal, the red target part 102 and the green target parts 103 and 104 are visually recognized simultaneously, and the target part 105 is alternately viewed in red / green.
In addition, in order to place the red filter and the green filter in front of the eyes, a subjective refractometer that can switch and arrange the red filter and the green filter in the left and right inspection windows is used, or a red-green having a red filter and a green filter. Glasses are used.
Japanese translation of PCT publication 5-130975 JP 2006-42978 A

  However, it has been found that the red filters used in the subjective refracting power measurement apparatus and the red / green glasses have different wavelength transmission characteristics even if they are the same red color. The wavelength transmission characteristics of the green filter may be different. This differs depending on the device manufacturer, and even in the same device manufacturer, there are variations in the red filter / green filter. For this reason, when using some subjective refracting power measurement device or red / green glasses, the green target part and the red target part are not visually recognized separately by the left and right eyes, and some of them are seen without disappearing. I understand the problem. For example, in the example of the inspection target 100 in FIG. 3, when viewed through the red filter, the green target parts 104 and 105 are assimilated into the black background 101 as shown in FIG. In some cases, it may appear pale green. In such a case, the binocular visual function test cannot be performed accurately.

  In view of the above-described problems of the prior art, the present invention can change the red / green binocular visual function test target to the left and right even if the wavelength characteristics of the red filter / green filter used in the binocular visual function test are different. It is a technical problem to provide an optotype presenting apparatus that can be viewed separately and can perform inspection more accurately.

  In order to solve the above problems, the present invention is characterized by having the following configuration.

(1) Visual target presentation including a visual target selection means for selecting an inspection target including a visual acuity target and a red / green binocular visual function inspection target, and displaying the selected inspection target on a color display In the apparatus, storage means for storing color adjustment data of the inspection target, storage means for storing a plurality of color adjustment data relating to the red / green binocular visual function inspection target, and stored in the storage means Further, color adjustment selection means for selecting one of a plurality of color adjustment data relating to the red / green binocular visual function test target, and the red / green binocular visual function test target by the target selection means Display control means for displaying the red / green binocular visual function test target on the display based on the color adjustment data selected by the color adjustment selection means. And
(2) In the optotype presenting apparatus according to (1), the red / green binocular visual function test target includes a black background test target in which a red target unit and a green target unit are arranged on a black background; The color adjustment data relating to the red / green binocular visual function test target stored in the storage means includes a white background test target in which a red target unit and a green target unit are arranged on a white background. And color adjustment data set for the black background inspection target and color adjustment data set for the white background inspection target.

  According to the present invention, even when the wavelength characteristics of the red filter / green filter used in the binocular visual function test are different, the red / green binocular visual function test target can be viewed separately on the left and right. And the inspection can be performed more accurately.

  Hereinafter, the present embodiment will be described with reference to the drawings. FIG. 1 is a schematic configuration diagram of the optotype presenting apparatus, and FIG. 2 is a control block diagram of the optotype presenting apparatus. In FIG. 1, a color liquid crystal display (LCD) 72 and a receiving unit 74 that receives an optical signal from the remote controller 4 are provided on the front surface of the casing of the target presentation device 70. In addition, a function switch 73 including four switches 73a to 73d is provided below the housing of the target presentation device 70. These function switches 73 display a condition setting screen on the LCD 72 and are used as an operation unit when setting parameters.

  The display on the LCD 72 is controlled by the control unit 75. A large number of pixels are geometrically arranged inside the LCD 72, and each pixel is composed of a filter (hereinafter referred to as an RGB filter) that transmits specific wavelengths of red, green, and blue. The color tone of the inspection target displayed on the LCD 72 can be changed by the control unit 75 controlling the amount of light that passes through the RGB filter for each pixel. A function switch 73 and a memory 76 are connected to the control unit 75. The memory 76 stores configuration data of the inspection target and setting data for color adjustment (brightness and hue) of the inspection target.

  The remote controller 4 transmits a number of inspection target selection switches 4a for selecting an inspection target, a display 4b for displaying information on the selected inspection target, and an inspection target selection signal as an optical signal. And a transmission unit 4c. Further, when using the subjective refractive power measurement device 60 at the time of inspection, the operation unit 5 is connected to the control unit 75. The subjective refracting power measuring device 60 is configured to switch and arrange a correction lens and various optical elements in the left and right inspection windows 61R and 61L.

  The test target displayed on the display 72 of the target presentation device 70 includes a visual acuity target for refractive power test, a red / green target for checking overcorrection, and a binocular visual function test. For this purpose, a red / green binocular visual function test target (see FIG. 3 and the like) including a red target part and a green target part is prepared. When a red / green binocular vision test target is displayed on the display 72, red-green glasses 30 in which a red filter 30R is disposed on the right eye side and a green filter 30G is disposed on the left eye side are used. Further, when using the subjective refractive power inspection device 60, the red filter 30R is disposed in the right eye inspection window 61R, and the green filter 30G is disposed in the left eye inspection window 61L. The switching arrangement of the red filter 30R and the green filter 30G to each inspection window is performed by a predetermined operation signal of the operation unit 5.

  3 and 4 are diagrams showing examples of red / green binocular visual function test targets. FIG. 3 shows an example of a Worth 4-point target for examining fusion and eye suppression. FIG. 3A shows the display state of the LCD 72. The Worth 4-point target 100 is disposed in the black background 101 on the left and right sides with the red circle target 102 disposed on the upper side. The green circular target parts 103 and 104 and the white circular target part 105 arranged on the lower side are configured. When the inspection view 100 is viewed through the red filter 30R disposed in front of the right eye, the red circle target 102 and the white circle target 105 are visually recognized in red as shown in FIG. Is done. On the other hand, since green light is cut by the red filter from the green circle target parts 103 and 104, the green circle target parts 103 and 104 are visually recognized in black and are buried in the black background 101. Further, when viewed through the green filter in front of the left eye, as shown in FIG. 3C, the red circle target 102 is black because the red light emitted therefrom is cut by the green filter. It is visually recognized and is buried in the black background 101. On the other hand, the green circular target parts 103 and 104 and the circular target part 105 are visually recognized in green. When the Worth 4-point target 100 is viewed with both eyes, when it is visually recognized in the state of FIG. 3B, it is determined that the left eye is suppressed, and is visually recognized in the state of FIG. It is determined that the right eye is suppressed. When the fusion is normal, the red target part 102 and the green target parts 103 and 104 are visually recognized simultaneously, and the target part 105 is alternately viewed in red / green. Further, when three bright spots of these target parts are seen (not shown), it is determined to be double vision.

  FIG. 4 is an example of a cross oblique target with a fixed viewpoint for the oblique inspection. 4A is a cross-point oblique target 130 with a fixed viewpoint, a fixed viewpoint 132 that is a black target portion arranged in the center of a white background 131, a left horizontal line 133R that is a red target portion, Similarly, it is composed of a lower vertical line 134R that is a red target part, an upper vertical line 135G that is a green target part, and a right horizontal line 136G that is a green target part. FIG. 4B shows a case where the oblique target 130 is viewed through the green filter 30G. In this case, since the green light from the white background 131 passes through the green filter 30G, it appears green. The green upper vertical line 135G and the right horizontal line 136G also appear green because the green light passes through the green filter 30G. For this reason, the upper vertical line 135G and the right horizontal line 136G appear to be assimilated with the background 131, and the shapes thereof cannot be recognized. On the other hand, red light from the red left horizontal line 133R and the lower vertical line 134R cannot pass through the green fill 30G and is recognized as black by the subject.

  FIG. 4C shows the case viewed through the red filter 30R. In this case, the background 131 appears red, and the red left horizontal line 133R and the lower vertical line 134R appear assimilated to the background 131, so that the shape cannot be recognized. On the other hand, since the green upper vertical line 135G and the right horizontal line 136G have no red light, the green light cannot pass through the red filter 30R and is visually recognized by the subject as black. Since the black fixed viewpoint 132 does not have both a red component and a green component, it is recognized as black in each of FIGS. 4B and 4C.

  Thus, since the visual targets that are visible through the red filter 30R and the green filter 30G are different, the subject can perform an oblique inspection using the fixation point 132 that is a fusion visual target. In the case of a normal eye, as shown in FIG. 4 (d), it looks in a state where FIGS. 4 (b) and 4 (c) are synthesized. However, for example, when the eye to be examined has a horizontal oblique position, the upper vertical line 135G and the right horizontal line 136G, the left horizontal line 133R, and the lower vertical line 134R appear to be shifted in the horizontal direction.

  When such a red / green binocular visual function test target is viewed through the red filter 30R and the green filter 30G used in a subjective refractive power measurement apparatus 60, the target 100 in FIG. As a result, as shown in FIG. 3D, the green target parts 104 and 105 are not assimilated into the black background 101 but appear as light green. 4, when viewed through the red filter 30 </ b> R, the red left horizontal line 133 </ b> R and the lower vertical line 134 </ b> R appear brighter red than the background 131 red, and there is a difference from the background 131. It was. On the other hand, the green upper vertical line 135G and the right horizontal line 136G are not the same black as the fixation point 132, but appear to be black with a slightly green component. Thus, when the target part is not assimilated in the background (if the target part does not disappear, the accuracy of the binocular visual function test becomes poor.

  FIG. 5A shows the result of examining the wavelength transmission characteristics of the red filter 30R used in the apparatus 60 having the above-described problems. FIG. 5B shows the result of examining the wavelength transmission characteristics of the red filter 30R used in the device 60 in which the above-described problem did not occur. FIG. 6 shows the results of examining the visual characteristics when only green light is emitted and the visual characteristics when only red light is emitted in the display control of the LCD 27. Note that the RGB of the target displayed on the LCD 27 can change the luminance level from 0 to 31. When green is displayed, (R, G, B) = (0, 31, 0). When the display is red, (R, G, B) = (31, 0, 0).

  As shown in FIG. 5B, the transmittance is almost 0% in the wavelength range of 600 nm or less. On the other hand, looking at FIG. 5A of the wavelength transmission characteristics of the problematic red filter 30R, light is transmitted even though the wavelength is slightly in the wavelength range of 550 to 600 nm. . On the other hand, looking at the visual characteristics by the green display of the LCD 72 in FIG. 6, the visual characteristics are obtained up to a wavelength of about 600 nm with a peak at about 550 nm. For this reason, in the red filter 30R having a problem, although it is slight, since the green light is allowed to pass, it is estimated that the above result is obtained. In particular, in the human eye, green is also affected by the fact that the visual characteristic is higher than that of red (it is easily perceived by the eyes).

  In addition, regarding the wavelength transmission characteristics of the green filter 30G, there was no significant difference this time even in different devices 60 or red-green glasses. However, since the green filter 30G also has various characteristics, if the device manufacturer is different, the red color The same problem as the filter 30R may occur.

  In order to cope with the above-described problems, the present apparatus, with respect to the red / green binocular visual function test target displayed on the LCD 72, each RGB luminance level (luminance) of each target part constituting the target. Alternatively, one is selected from a plurality of color adjustment data obtained by changing the setting value of the display color of the hue in a plurality of stages. Here, description will be made assuming that the display color of the red / green binocular visual function test target is switched between two modes of High mode and Low mode. The High mode is prepared for the red filter 30R having the wavelength transmission characteristics shown in FIG. 5B (the red filter having no problem). The Low mode is prepared for the red filter 30R having the wavelength transmission characteristics shown in FIG. 5A (the red filter in which the above problem has occurred). The selection signal for the high mode and the low mode is input by a switch operation of the function switch 73.

  The RGB luminance levels (color adjustment data) of each target part in the high mode are set as follows. Note that the RGB of each target portion displayed on the LCD 72 can be changed from 0 to 31 in the respective luminance levels as described above. Level 31 is the highest luminance. The white background and the white target part are set as (R, G, B) = (31, 31, 31), and the green target part is (R, G, B) = (0, 31, 0). Is set, and the red target part is set as (R, G, B) = (31, 0, 0). Note that the background of the black background and the black target portion are set as (R, G, B) = (0, 0, 0).

  The RGB luminance levels (color adjustment data) of each target unit in the Low mode are similar to the type in which a red / green target unit is formed on a black background, like the Worth four-point target in FIG. It is divided into a type that forms a red / green target part on a white background, such as a cross oblique target.

  First, the black background type is set as follows. The white target part is set as (R, G, B) = (16, 16, 16), and the green target part is set as (R, G, B) = (0, 13, 0). The red target part is set as (R, G, B) = (25, 0, 0). The background of the black background and the black target part remain (R, G, B) = (0, 0, 0).

  As described above, in the black background type, the green light passing through the red filter 30R in FIG. 5A is reduced by reducing the luminance of the green target portion (the target portions 104 and 105 in FIG. 3). Can be assimilated on a black background. In addition, in order to balance the luminance of the white-colored visual target portion that is seen in green when viewed through the green filter 30G in accordance with the decrease in the luminance of the green visual target portion, The luminance of each RGB is also reduced overall. Also, the brightness of the red target part is reduced in order to balance the brightness of the green target part.

  The white background type is set as follows. The white background and the target part are set by (R, G, B) = (28, 28, 28), and the green target part is set by (R, G, B) = (0, 29, 0). The red target part is set as (R, G, B) = (31, 15, 15). The background of the black background and the black target part remain (R, G, B) = (0, 0, 0).

  Thus, in the case of the white background type, when displaying the red target part, not only R (red) but also G (green) and B (blue) luminances are added to the hue (color tone: RGB composition). Is changing. Furthermore, the brightness of the white background and the target part is slightly reduced as a whole. As a result, when the red target part is viewed through the red filter 30R having the wavelength transmission characteristic of FIG. 4A, the red target part is easily assimilated in the red background. Further, as the appearance of the red visual target portion becomes thinner, the brightness of the green visual target portion is slightly reduced to balance the two.

  The RGB luminance level setting values (color adjustment data) of each target unit in the high mode / low mode as described above are stored in the memory 76 in advance.

  FIG. 7 is a view showing a list of inspection targets to be switched between the High mode and the Low mode. As a red / green binocular visual function test target to be switched between the high mode and the low mode, in addition to the above-described test target, a cross oblique target having no fixed viewpoint, an unequal image visual target, and the like. Marks, cross-ring targets for oblique inspection, convoluted targets, stereoscopic targets, and the like are prepared. In FIG. 7, “1” is set for the target to be switched in the High / Low mode, and “0” is set for the target to be excluded, and this setting is stored in the memory 76. For cruciform targets, unequal image targets, and convoluted targets, select the white background type and black background type on the parameter setting screen displayed on the LCD 72 by operating the function switch 73. Is possible. The stereoscopic target is prepared as a white background type.

  Here, as a target including red and green displays, there is a red / green target 140 for inspecting overcorrection at the time of refractive power inspection as shown in FIG. The red / green visual target 140 includes a black visual target 142a composed of characters and symbols formed in the left red background 141R and a black visual component composed of characters and symbols formed in the right green background 141G. And a standard part 142b. In the inspection using the optotype 140, the sharpness of the black optotype part 142b in the red background 141R and the black optotype part 142b in the green background 141G is compared, and depending on whether both look the same, Inspect for overcorrection. This inspection target includes red and green, but since this target is not an inspection using the red filter 30R and the green filter 30G, it is excluded from the target (brightness) switching of the target in the High mode / Low mode. Yes. That is, when the red / green visual target 140 is displayed, the control unit 75 calls the pre-stored values in the memory 76 as the predetermined set values of the respective RGB luminances that are the display colors, It is displayed on the LCD 72. As a test target of the same type, there is a polarized red / green target. Similarly, with respect to the visual acuity target, each luminance of RGB, which is the display color, is set in advance and stored in the memory 76.

  The RGB luminance levels (color adjustment data) of the red / green visual target 140 are set as follows. The red background 141R is set by (R, G, B) = (31, 0, 0), the green background 141G is set by (R, G, B) = (0, 31, 0), and the black visual target part. 142b is set by (R, G, B) = (0, 0, 0). The visual acuity target (see FIG. 1) is composed of a Landolt's black target on a white background, and the white background is set by (R, G, B) = (31, 31, 31). The mark is set by (R, G, B) = (0, 0, 0).

  Next, a procedure for changing the red / green binocular visual function test target to be displayed on the LCD 72 to the Low mode will be described. When any one of the function switches 73 is pressed, a parameter setting screen 80 is displayed on the screen of the LCD 72 as shown in FIG. The parameter setting screen 80 includes items 82 for setting various parameters of the apparatus. An operation condition 84 is displayed below the screen 80, and each operation condition 84a to 84d corresponds to the switch 73a to 73d of the function key 73. Here, the UP key 84a is the switch 73a, and the DOWN key 84b is The switch 73b and the screen change key 84c correspond to the switch 73c, and the CHANGE key 84d corresponds to the switch 73d, respectively.

  Here, by operating the UP key 84a and the DOWN key 84b, the cursor 81a is set to “Brightness R / G” and the CHANGE key 84d is pressed to change the display to “Low”. After that, when the cursor 81a is set to “EXIT” 83 with the DOWN key 84b and the CHANGE key 84d is pressed to end the setting screen, the setting change to the Low mode is completed. Thereby, a plurality of red / green binocular visual function test targets are collectively switched to the Low mode.

  In the case of a red filter / green filter that does not need to be switched to the Low mode, the High mode is used. If it can be used in the high mode, for example, in the target 100 of FIG. 3, the target units 102 and 105 when viewed through the red filter appear bright red, and the target units 103 and 104 when viewed through the green filter 30G. And since the target part 105 looks bright green, the difference between the two becomes clear. This improves the accuracy of the inspection.

  In the actual inspection, when the inspection target is selected by the switch 4a of the remote controller 4, the selection signal is input to the control unit 75 via the transmission unit 4c and the reception unit 74. The control unit 75 calls the configuration data of the inspection target selected from the memory 76 based on the inspection target selection signal, and also calls the color adjustment data of the selected inspection target. Here, when the red / green binocular visual function test target is selected as the test target, the color adjustment data corresponding to the selected mode is further obtained based on the selection signal of the High mode / Low mode. call. Then, the control unit 75 causes the LCD 72 to display the inspection target based on the called configuration data and color adjustment data of the inspection target. When the visual acuity test target other than the red / green binocular function test target, the red / green target 140, and the like are selected by the switch 4a, the selection of the High mode / Low mode is irrelevant. 75 reads predetermined color adjustment data corresponding to each from the memory 76 and displays the inspection target on the LCD 72.

  The above embodiment can be variously modified. For example, the RGB luminance level of each target unit in the Low mode is set in advance by the device manufacturer. If there is a red filter / green filter from another manufacturer, the luminance level is checked accordingly. Can change. In this case, first, the parameter setting screen 80 is displayed as described above, “Brightness R / G” is selected, and the Low mode is selected with the CHANGE key 84d. Here, since the conditions preset by the manufacturer are registered in the Low mode, the examiner performs correction modification of the conditions.

  When the switch 73c is pressed for a long time with the Low mode selected, a confirmation screen 90a (hereinafter, confirmation screen (white) 90a) shown in FIG. 10A or a black background shown in FIG. 10B is displayed. In this case, a confirmation screen 90b (hereinafter, confirmation screen (black) 90b) is displayed, and a low mode setting screen 85 is displayed on each of the confirmation screen (white) 90a and the confirmation screen (black) 90b. Note that whether the confirmation screen (white) 90a or the confirmation screen (black) 90b is displayed is determined by the position of the cursor 81b on the setting screen 85.

  The Low mode setting screen 85 includes a condition setting screen 85a when the background is white (hereinafter, setting screen (white) 85a) and a condition setting screen 85b when the background is black (hereinafter, background setting screen (black) 85b). The character display 86 of the background color is clearly specified above each screen. Condition setting items 87a and 87b are provided in the setting screen (white) 85a and the setting screen (black) 85b, respectively, and the RGB brightness levels of the LCD 72 can be set. The brightness level is determined by operating the switch 73a corresponding to the UP key 89a for moving the cursor 81b to the next position, operating the switch 73b corresponding to the DOWN key 89b for moving to the previous position, moving the cursor 81b, and the RGB filter. R, G, or B in the luminance input field 88 is selected. Thereafter, the switch 73c corresponding to the plus key 89c and the switch 73d corresponding to the minus key 89d are operated to adjust the luminance level to a desired value.

  Here, when the confirmation screen (white) in FIG. 10A is displayed, the examiner passes the red filter 30R / green filter 30G through the red screen of 91a, the green screen of 92a, and the white screen of 93a. , 94a to see how the black screen looks. Similarly, when FIG. 10B is displayed, the red screen of 91b, the green screen of 92b, the black screen of 93b, and the white screen of 94b are confirmed via the red filter 30R / green filter 30G. When the disappearance of the red target part / green target part is poor, the luminance is re-input by the above-described method, and the visual condition is reconfirmed through the red filter 30R / green filter 30G. When the luminance input is completed, the setting is stored by long pressing the switch 73c. Thereafter, the cursor 81a is moved to EXIT 95, and the switch 73d is pressed to end the setting screen.

  In this way, the examiner can adjust the color such as the luminance while checking the appearance of the red target part / green target part via the red filter 30R / green filter 30G. The red / green binocular visual function test target can be changed to an appropriate view according to the difference in the characteristics of the / green filter 30G.

  In addition, the adjustment of color adjustments such as the brightness and hue of the red / green binocular visual function test target is not limited to two patterns in the High / Low mode, but in three levels as in the High / Middle / Low mode. A plurality of luminance conditions may be registered in one item, such as 5 levels of 5 to 1 according to the strength.

  In addition, the change of color adjustment settings such as brightness and hue of red / green binocular vision test target is applied to multiple items at once, but the examiner changed it for each target. Things may be registered in the memory 24.

  In the above description, the luminance and the like of the red / green binocular visual function test target are changed as the characteristics of the red filter / green filter are different. However, depending on the environment in which the target presentation device is placed Color adjustment including the luminance of the target may be switched. For example, when the room where the optotype presenting apparatus is placed is bright and dark (dark room), the way of feeling the brightness of red and green differs, and accordingly the red / green binocular visual function test target It is desirable to be able to switch color adjustments such as hue / brightness. Further, it is convenient to provide a brightness detection sensor so that the control unit 75 changes the display color of the LCD 72 based on the detected brightness.

It is a schematic block diagram of a visual target presentation apparatus. It is a control block diagram of an optotype presenting apparatus. It is a figure which shows the example of a red / green binocular vision function test | inspection target. It is a figure which shows the example of a red / green binocular vision function test | inspection target. It is a figure which shows the wavelength transmission characteristic of a red filter. It is a figure which shows the luminous characteristic when emitting only green, and the luminous characteristic when emitting only red in the display of LCD. It is a list of inspection targets to be switched between High mode / Low mode. It is an example of a red green target for inspecting overcorrection at the time of refractive power inspection. It is a figure of the parameter setting screen displayed on LCD. It is an example of a screen used when changing the setting value of the color adjustment of each target part in Low mode.

Explanation of symbols

4 remote control 4a inspection target selection switch 30R red filter 30G green filter 60 subjective refractive power measurement device 70 target presentation device 72 display (LCD)
73 Function switch 75 Control unit 76 Memory 100 Worth 4-point target 130 Cross oblique target with fixed viewpoint

Claims (2)

In an optotype presenting apparatus that includes a target selection means for selecting a test target including a visual acuity target and a red / green binocular visual function test target, and displaying the selected test target on a color display.
Storage means for storing color adjustment data of the inspection target, storage means for storing a plurality of color adjustment data relating to the red / green binocular visual function inspection target, and the red stored in the storage means / Color adjustment selection means for selecting one of a plurality of color adjustment data relating to the green binocular visual function test target, and the red / green binocular visual function test target is selected by the target selection means Display control means for displaying the red / green binocular visual function test target on the display based on the color adjustment data selected by the color adjustment selection means. Sign presentation device. 2. The visual target presenting apparatus according to claim 1, wherein the red / green binocular visual function test target includes a black background test target in which a red target unit and a green target unit are arranged on a black background, and a red target. A white background inspection target arranged on a white background, and a green target part and a green target part,
The color adjustment data related to the red / green binocular vision test target stored in the storage means is set for the color adjustment data set for the black background test target and the white background test target. An optotype presenting apparatus characterized by having color adjustment data.

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